html,
body {
    width: 100%;
    height: 100%;
    background-color: #222;
}

.content {
    width: 100%;
    height: 100%;
}


/* stage -- start */

.stage {
    position: relative;
    width: 100%;
    height: 100%;
}


/* /stage -- end */


/* image  -- start*/

.img-sec {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #DDD;
}


/* /image -- end*/


/* controller -- start*/

.controller-nav {
    position: absolute;
    left: 0;
    bottom: 30px;
    z-index: 101;
    width: 100%;
    text-align: center;
}


/* /controller -- end*/